Concentration Risk

Aehr Test Systems, Inc. (NASDAQ:AEHR) was highlighted by Prosper Stars & Stripes as a significant detractor in their short book for Q1 2026. The company provides equipment for testing and burn‑in of semiconductor devices at the wafer level, but its niche solution has limited broad‑based adoption. Key concerns raised by Prosper Stars & Stripes include high customer concentration with ON Semiconductor accounting for approximately 80% of revenue, limited exposure to growing areas such as AI and silicon photonics, and declining revenue and lack of profitability.